I have a 1975 version of the "RCA Receiving Tube Manual"; anything not
listed on the Heathkit list can probably be figured out from this.

BTW: there's a circuit included in the back for a FM tuner utilizing 3
tubes (two 6CW4 nuvistors and a 6KE8).

Have fun!

--
"The whole aim of practical politics is to keep the populace alarmed-
and hence clamorous to be led to safety- by menacing it with an endless
series of hobgoblins, all of them imaginary. "--

H.L. Mencken